According to a new survey, cultural lifestyle changes inspire evolutionary adaptations more often than previously thought.

One of the best examples of a cultural change with evolutionary impacts is the development of dairy farming. The increased production of animal milk for human consumption inspired genetic changes in milk drinkers.

Genes responsible for lactose tolerance became common in populations where milk consumption was common. The same genes are rare among non-dairy cultures.

Authors of a new study on the subject, published this week in the journal Nature Communications, found "gene-culture co-evolution" isn't unique to humans. Cultural changes, scientists determined, also trigger evolutionary changes among other animals, including killer whales.

Researchers found different killer whale clans have adapted unique jaws and digestive systems to help them catch, process and digest different prey species.

The hunting strategies and prey preferences of older killer whales are taught to the next generation. As a result, a cultural lineage forms among clans. These distinct dietary preferences trigger evolutionary changes among whales, just as they do among humans.

Scientists surmise the evolutionary effect is great enough to drive species' divergence. As a result of cultural differences between clans, killer whales could be in the process of splitting into different species.

Researchers suspect cultural differences can also drive brain evolution. Orangutans in Sumatra, which demonstrate greater cultural diversity, have bigger brains and are smarter than orangutans in Borneo.

The new survey determined gene-culture co-evolution is most common among birds, dolphins, whales and primates.

"There is even evidence that the cultural traditions of one species can drive the evolution of another," Andrew Whiten, professor of psychology and neuroscience at the University of St. Andrews, said in a news release. "Reed warblers, for instance, learn to recognize cuckoos as brood parasites by attending to the alarm calls of other birds, a knock-on consequence of which is that natural selection favors cuckoos with unusual plumage patterns."

Related Links
Darwin Today At TerraDaily.com

Tweet

Thanks for being here; We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain. With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords. Our news coverage takes time and effort to publish 365 days a year. If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor $5 Billed Once credit card or paypal		SpaceDaily Monthly Supporter $5 Billed Monthly paypal only

Mammals evolve bigger brains when dads take on parenting duties
Washington (UPI) May 30, 2019
The parents of mammals with larger brains tend to share parenting duties, according to a new study, with both mom and dad involved in raising offspring. Scientists also found mammals with greater reproductive success tend to have help from non-biological parents, or alloparents. Researchers analyzed data on the parenting behaviors, brain size and fertility of 478 mammal species, including lions, mice, meerkats, monkeys and apes. The analysis showed different types of parental support aids diffe ... read more